
Occasionally, you’ll find that a USB flash drive will refuse to format and Windows will tell you that it is write protected, even though there is no switch.
Here are a couple of methods you can try to format the drive and remove the write protection. Bear in mind that there is no guarantee that they will work for you: your drive or memory card may be corrupt or broken and no utility or low-level formatting tool will make it work again. The only solution in this case is to buy a new drive.
Removing write-protection in the Registry using Regedit.exe



